I've been using one of these daily at work for the past couple of months, it fits nicely in the hand, cursor control is smooth and the scroll wheel clicks reasuringly through the steps. As I'm a bit of an amatuer photographer, I've 'borrowed' it a couple of times to use at home, the DPI button makes creating masks and cutting out backgrounds a lot simpler and far less fiddly.
Looks wise, the pictures don't do it justice, its a stylish metallic silver colour with black trim and the curves set it off nicely.
On battery life, I haven't had to change them yet, with other Mice I've used it's usually a monthly chore finding new batteries and disposing of old ones but the single AA that came with this is still going strong.
In Summary, I can whole heartedly recommend this mouse, it fits the hand well, has great battery life and the build quality is far better than I'd expect at this price point.